Dust guard



R. F. DARBY.

DUST GUARD.

APPLICATION man MAR. 3, |92'.

Patented J ue 6, 1922.

2 SHEETS-suffi 1.

R. F. DARBY.

DUST GUARD.

APPLICATION man MAR. s, 192|.

Patented June 6,1922.

2 SHEETS-SHEET 2.

automatic "lu-@E95 v.ROBERT n. DARB'Y; or YoNnERs, NEW Yoan.`

DUST GUARD.

To all whom tf/nay concern.'

Be it known that l, RonnRrF. DARBY, a citizen of the United States, anda resident ot Yonkers, in the county of lVestchester and State oli NewYork, have invented certain new and useful Improvements in vDust-Gruards, ot which the 'Following' is a specitica-tion.

The principal purposeot" this invention is to produce a dust guard foraxle carrying journal boxes, ot extreme simplicity, cheapnessoliconstruction, durability, and adjustability with respect'to wear. f

A further object isto provide a guard made essentially Yfrom a singleplate ot laminated material, so bonded as .to resist penetration andconsequent separation.l by submersion in lubricating oils and which doesnot bender warp, the sections of the plate being constrained together bya unitary resilient element acting also to maintainthem in register'.V

A These and other analogous objects-fare attained by the novelconstructionV and arrangement ot parts ,hereinafter described and `shownin the annexed drawings, forming an essential in which: i

Figure 1 4is a t'ront elevationalyiew of adust guard showing a preferredtorni of the invention.

VFigure 2 is a side view of the same. Figure 3 is a frontvie'w'showing amodited'torm of guard structure.

' YFigure f1 sidey View thereof. Figure 5 is a perspective view of 'thpart ot' this disclosure, and

Iguardfparts being broken away to show the guard.

construction.

' Figure 6 is a fragmentary sectional View showingthe joint betweensections oit 4'the Figure 7 is a fragmentary perspective View of theresilient retaining element.;

Stated in general terms, this invention, which is an improvement on anearlier guard, patented by me October 19, 1920,

Y 1,356,()1L6, is formed from a single` plate of Iuniform thicknessthroughout, bored tor A the axle and having a semi-circular bottom.

The blank is grooved or recessed substan- Itially central 'oflits-lateral edges and also -it isk to be used. l f 1 vmaintain contactwith the'aXle;

Specification of Letters Patent. Patented 6,A 19.22.

Application filed.y March 3, 1921. Serial No. 449,391.

imately at the center of theaxley opening, parallel with the top.

i The joint may be made so that the con` tacting portions are offset inoverlapping relation, or each grooveolfto receive a key, preventinglateraly movement of the main parts, but preferably the constrainingmeans is formed with undulations filling the side. grooves andmaintaining vthe, upper andI lower elements in Vertical relation as wellas holding them togetherkand taking .up any wear that may occur.

Referring now to 'the drawings 'in detail,`

the numeral 15 designates the 'upper element ofthe guard and 16 theVcorresponding lower element, both being cutvfrom an integral blankplatecomprised ofilay'ers of `relatively thin sheets', as wood Veneer,invdurated fibre or like ibrous'materialy bond'- ed by cementy capableof lresisting the evtects oi oil, grease, water or like solvents.

'These elements, before separation,apresent a blank bounded by aVstraight topr 17- having right angled side edges 18 merging into acurved bottom 19. p -V A central longitudinal channel or` groove 20 istormedfrom end to end lin the top edge 17 .of the upperielement andregistering channels 21 inthe side edges 18,the latter'. depth and'terminate in y the` p being kof lesser curve 19.

On the. center line lof the blank, 1

planef uniform withor slightlyabove that at which the radiu'softhe curve19 is taken,"v

the axle or sha-ft in connection Theblank'is cut across to haltiitsthickness on one iside, as at 23, in aiplane slightly aboveft-lre'centerof tlieopening 22 and on the center, the materialbeingshearedy or split between the lcutson the center` of the'blanksthickness, separating the Vsame-into two sections, 1n orderto takeup 'wear and At the bottomsotfthey side ychannels 21,

ynear their ends vin the Ylowery elements '16,

is ank opening-22 suited-to thewdiameter of.v

:with which ,v

are holes 26 drilled substantially radial with respect to the opening 22and fitting these holes are the angularly bent ends 30 of a wire 3l bentto form undulations 32 and 33 making Contact at the extremities of theirloops with opposite sides'of the channels 21 in such manner as to holdthe sections in alignment.

A`VThree or more of the undulations are formed to engage 'the lowersection and at least as many with the channels in the upper element l5,the wire continuing, as at 34, straight upward to curved bends and thenmergesinto a curve 36 of large radius 'disposed in the channel 20 andmaking contact with its bottom, acting as a spring by which Vthesections are drawn together; although the spring element is shown asround, obviously a flat spring may be used.

In the modified form, shown in Figs. 3, 4, and 6, the blank isformed inthe same manner with respect to its contour `and axle opening, but thechannels 20 and 21 -are relatively narrower and the constraining element34, including its ends 3() andl curves 35 and 36 are adapted to ht thechannels, the undulations: 32-33 being omitted.

A single transverse cut 40 is made across the blank in the plane oit thecenter of the opening" 22 and thel separated edges are centrallygrooved, as at el and 4l respectively in the upper and lower portions.

Tightly fitted to the grooves Lll are keys Vor tongues 4t2 of wood orlike material, their extending ends entering lreely into the grooves al,in the upper element l5, in such manner as to permit relative movementolthe sections, towards or from each other, while the key obviouslyprevents side movement of the sections.

lt is to be noted that the spring bands 35 are raised from the bottomsof the channels il() or 20 an amount sufficient to permit the sectionsto be separated in order to 'freely enter the axle into the opening 22,but not enough to'allow the joints to become .flis` it will beunderstood that changes in the form, arrangements, proportions, sizesand details thereof may be made without departing froml the scope or theinvention as de- `lined in the appended claims.

VHaving thus described my invention, what I claim and `desire to secureby Letters Patent is 1. A, dust guard comprising a laminated plate cutto form a` rectangular uppery section and a semi-circular lower sectionhaving between theman aXle receiving opening :and a single meanspassingirom one side to anl other, wholly contained within the contourof the side top edges of the laminated plate for resilientlyconstraining the sections in operative relation, said plate presenting asubstantially level upper edge. I y

2. A dust guard k"comprised of a single blank of uniform thicknesshaving channels in its upper and side edges, said blankhaving a centralopening and cuts leading there- "from tothe side et ges dividing theblank in its level upper andv side edges, said blank having a centralopening, upper and lower sections formed by dividing said blank trans`versely on the center line of' the opening, tenon and mortice elementsformed `in the adjacent edges of said elements, and a unitary springconstraining element concealed in the mentioned channels circumambientsaid upper section and having angular ends removably engaged in saidlower section permitting separation of the section.

4. A dust guard comprising a plurality of sheetsof fibrous materialbonded by an impervious cementinto a plate of uniform thicknesscontaining a central opening andv vdivided into upper and lowersect-ions in a plane corresponding toA the center ofthe opening, saidupper section being substantially rectangular and'said lower sectionbeing bounded by a curve the radius ot which is taken at a point belowthe center oi' the opening, and concealed means Yfor resiliently ldrawing said sections towards veach other.

A dust guard comprised of a single blank otunitorm thickness havingchannels in its upper and side edges, said blank having a centralopening, upper and lower sectio-ns formed by .dividing said blanktrans-` versely on the center line of the opening, saidlower sectionhaving a' semi-circular contour gradually increasing romthe sides towardthe center, means- 'for preventing lateral movement ot sections,andtensional means for drawing saidfsections together,

said tensional means being concealed land protected within the mentionedchannels.y

G. A. dust guard comprised of a single blank ot Aunilormthickness havingchannels in its upper land side edges, said blank hav ving a centralopening, upper and lower-sections 'formed bydividing said blank transversely on the center l-ine of the opening, a lstrip of springmaterialhaving itsv ends fixed in said lower -section at thebottom otthe `side channels, undulating elements formed in said strip adapted tomake'contact with the opposite walls of the side chanversely on thecenter line of the opening,

tenon and` mortice elements formed 'in the adJacent edges of saidelements, a single spring constraining element disposed Wholly y withinthe mentioned channels, said elements having angular ends fixed in saidlower section, and means formed with the upper portion of said elementlimiting the separation of said sections.

8. A dust guard comprised of a single blank of uniform thickness havingchannels in its upper and side edges, saidblank having a centralopening, upper and lower sections foimed by dividing said blanktransversely on the center line of the opening, a strip ofspringmaterial having its ends fixed in said lower section at the bottomof thel side channels, undulating elements formed in said strip adaptedto make contact with the opposite walls of the side channels inl bothupper and lower sections, a concavely curved element in said springconnectingv the side elements thereof by convex curves, said convexcurves being raised above the bottom of the top channel, and keys fittedin said lower section entering grooves in said upper section, theoutward motion of said keys being limited by the height of the con# vexcurves in said spring.

9. A dust guard comprising a flat laminated plate of uniform thicknessdivided into two sections having between them an axle receiving opening,and a single means wholly contained within the edges of said sectionsfor resiliently constraining them. in operative relation, said meansbeing reinovable to permit separation of the sections.

l0. A dust guard comprising; a single lam.

inated plate divided into two sections provided with channelled edgesand having be-A tween them an'axle receiving opening, and unitary meanshoused within the channelled edges for resiliently constraining the sections in operative relation. M

'11. A dust guardcomprising a laminated plate cut to form arectangular'upper sec-l`r tion and a substantially semicircular lowersection having between them1 an axle receiving opening,and means forresiliently constraining the sections in operative relation, said meansbeing` housed yat the lateral edges of the platev within the channelsformed .in said edges. y

' l2. A dust guard comprised of. a single blank of uniform thicknesshavingvchannels in its upper and side edges, said blank hav ing acentral opening and cuts leading therefrom to the side edge l,dividingthe blank into ,up-per and lower sections, and const rain-A ing meansfixed in the lower section, dis- A 13. A dust guard comprised o-f asingle blank of uniform thickness having channels in vits upper and sideedges, said blank havposedin the mentionedchannels. n

ing a central opening, upper and lower` secf tions formed by dividingsaid blank trans versely onf the center line of the opening, tenon andmorticeelements formed inthe adjacent edges of said elements, andasingle constraining element concealed-in the mentioned channelscircumambientsaid upper section and fixed in said lower section, saidelement being removably engaged therein.

14. A dust guard lcomprising a plurality of sheets of fibrousmaterialbonded by an impervious cementintoa plate of uniform thicknesscontaining a -central opening` and divided into upper and lower sectionsin a 1 plane corresponding to the center of the opening, said kuppersection being substantially rectangular and said .lower sectionv beingbounded by a curve, and concealed means Ifor resiliently drawingsaidsections towards eachother. i

ln testimony whereof I vhave signed my name to this specification.

,y Rois-ERT r. 'DARBYQ i

